Christmas is an annual holiday generally celebrated on December 25 by billions of people around the world. It is a Christian feast that commemorates the birth of Jesus Christ, liturgically closing the Advent season and initiating the season of Christmastide, which lasts twelve days. In much of the world's nations Christmas is a civil holiday, is celebrated by an increasing amount of non-Christians, and is an integral part of the Christmas and holiday season.

Christmas Tree

The precise day of Jesus’ birth, which historians place between 7 and 2 BC, is unknown. In the early-to-mid 4th century, the Western Christian Church first placed Christmas on December 25, a date later adopted also in the East. Theories advanced to explain that choice include that it falls nine months after the Christian celebration of the conception of Jesus, that it was the date of the Roman winter solstice, or of some ancient winter festival.

The original date of the Christmas celebration in Eastern Christianity was January 6 (see Epiphany), and that is still the date of the celebration in Armenia, where it is a public holiday, and for the Armenian Apostolic Church. As of 2011, there is a difference of 13 days between the Julian calendar and the more generally used Gregorian calendar. Those who use the Julian calendar or its equivalents thus celebrate December 25 and January 6 on what for the majority of people is January 7 and January 19. For this reason, Ethiopia celebrates Christmas, both as a Christian feast and as a public holiday on what in the Gregorian Calendar is January 7.

Many of the popular celebratory customs associated in various countries with Christmas have pre-Christian or secular themes and origins. Popular modern customs of the holiday include gift-giving, music, an exchange of Christmas cards, church celebrations, a special meal, and the display of various decorations; including Christmas trees, lights, garlands, mistletoe, nativity scenes, and holly. In addition, several figures, known as Saint Nicholas, Father Christmas, and Santa Claus, among other names, are associated with bringing gifts to children during the Christmas season. Because gift-giving and many other aspects of the Christmas festival involve heightened economic activity among both Christians and non-Christians, the holiday has become a significant event and a key sales period for retailers and businesses. The economic impact of Christmas is a factor that has grown steadily over the past few centuries in many regions of the world.

Christmas Wallpaper

The earliest evidence of the celebration on December 25 of a Christian liturgical feast of the birth of Jesus is from the Chronography of 354 AD. This was in Rome, while in Eastern Christianity the birth of Jesus was already celebrated in connection with the Epiphany on January 6. The December 25 celebration was imported into the East later: in Antioch by John Chrysostom towards the end of the 4th century, probably in 388, and in Alexandria only in the following century. Even in the West, the January 6 celebration of the nativity of Jesus seems to have continued until after 380.

Many popular customs associated with Christmas developed independently of the commemoration of Jesus’ birth, with certain elements having origins in pre-Christian festivals that were celebrated around the winter solstice by pagan populations who were later converted to Christianity. These elements, including the Yule log from Yule and gift giving from Saturnalia, became syncretized into Christmas over the centuries. The prevailing atmosphere of Christmas has also continually evolved since the holiday's inception, ranging from a sometimes raucous, drunken, carnival-like state in the Middle Ages, to a tamer family-oriented and children-centered theme introduced in a 19th-century reformation. Additionally, the celebration of Christmas was banned on more than one occasion within Protestant Christendom due to concerns that it was too pagan or unbiblical.